CVE-2026-42524 Jenkins HTML Publisher Plugin has a XSS vulnerability in the legacy wrapper file

What is CVE-2026-42524?

CVE-2026-42524 is a high-severity cross-site scripting vulnerability in Jenkins HTML Publisher Plugin, published on 29 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Jenkins HTML Publisher Plugin 427 and earlier does not escape job name and URL in the legacy wrapper file, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.

Weakness: CWE-79

Which versions are affected by CVE-2026-42524?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:htmlpublisher. It affects 1 product.

Products include Jenkins Html Publisher.

How do I fix CVE-2026-42524?

Upgrade org.jenkins-ci.plugins:htmlpublisher to 427.1 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-42524 being exploited?

There is no known exploitation of CVE-2026-42524 in the wild and no public exploit code.

Other vulnerabilities in Jenkins HTML Publisher Plugin

• CVE-2024-28149 Jenkins HTML Publisher Plugin does not properly sanitize input Medium 6.5
• CVE-2018-1000175 Jenkins HTML Publisher Plugin path traversal vulnerability Medium 6.5
• CVE-2025-53651 Jenkins HTML Publisher Plugin vulnerability displays controller file system information in its logs Medium 6.3
• CVE-2019-10432 Jenkins HTML Publisher Plugin vulnerable to Cross-site Scripting Medium 5.4
• CVE-2024-28150 Jenkins HTML Publisher Plugin Stored XSS vulnerability Medium 4.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f8h4-46xv-h7jj.